Smart WiFi Indoor/Outdoor Plug
MSS620HK / MSS620 US
  • IP44 waterproof housing, ideal for both indoor/outdoor use.
  • Turn each socket on/off individually with Meross app.
  • Works with Apple HomeKit*, Amazon Alexa, Google Assistant and SmartThings.
  • Create on/off schedule or auto-off timer to work automatically.
  • Works with the 2.4G WiFi you already have. No hub required.
  • Apple HomeKit website listed.



* Only MSS620HK supports HomeKit, MSS620 does NOT support HomeKit.





For iOS users, the Meross app will guide you to set up and manage MSS620HK in Apple Home app. Please use iOS 13 or above. You can launch Meross app and add MSS620HK once you finished the setup in Home app without resetting it. Meross app offers firmware update and troubleshooting, etc.

Note that HomeKit remote control requires you to install an iPad or HomePod or Apple TV in your house. Please go to Apple HomeKit website to learn more.

Some users feedback there was NO POWER OUTPUT after using the device for a while. Usually it is caused by an overload or short circuit which makes MSS620 blow its fuse* to avoid other SERIOUS DAMAGES in your home.
If you are experiencing NO POWER OUTPUT issue, please contact seller for solution.
* 10A rated fuse, please avoid using high power appliances, such as PUMP, POOL FILTERMOTOR, etc.
* For other plugs without fuse, an overload or short circuit may BURN OUT the plugged in appliances or even cause FIRES.

If you are experiencing NO POWER OUTPUT issue, please contact us for assist.


                                   Hardware Features-



100-125V~, 50/60Hz, 10.0A 


100-125V~, 50/60Hz, 10.0A maximum load

Port 2 x AC sockets

1 x On/Off button

Press and hold for 5 seconds to initiate factory reset process

LED 1 x Status LED
Waterproof IP44
Dimensions (W x D x H)   5.1 x 2.6 x 1.5 in. (excluding power cord)

Power Cord

7.5 in.


One internal antenna


                                   Wireless Features-


Wireless Standards                  

IEEE 802.11 b/g/n, 2.4GHz, 1T1R                                                             
Wireless Security       Support 64/128 bit WEP, WPA-PSK/WPA2-PSK
*Does not support Enterprise WiFi.




Certifications                    FCC, IC, ETL
Package Contents 1 x Smart WiFi indoor/outdoor plug

1 x User manual

System Requirements Smartphone running iOS 9* or higher, Android 4.1 or higher

Existing Wi-Fi network

*HomeKit version requiress iOS 13.0 or higher.


Operating Temperature: -10°C~40°C (14°F~104°F)

Storage Temperature: -40°C~70°C (-40°F~158°F)

Operating Humidity: 10%~90%­ non-condensing

Storage Humidity: 5%~90%­ non-condensing




                                                  1. How many smart home devices can the Meross app control?

                                                  2. Can my Meross smart home devices be controlled by multiple phones?

                                                  3Do Meross smart home devices retain the selected settings if it encounters a power outage?

                                                  4Will the Schedule and Auto off feature still take effect if the Internet is down?

                                                  6What should I do if my smart home device time doesn't match the real time?

                                                  7How do I control Smart Devices by Amazon Echo/Dot/Tap with voice commands?

                                                  8How do I connect my Meross devices to Amazon Alexa?

                                                  9Why I didn't find my device on "Select a Device Page" in Meross app?

                                                  10Do my Meross smart devices support Campus, Hotel, Airport or Shopping Mall WiFi Hotspots?

                                                  11How do I connect my Meross devices to Google Assistant?

                                                  13After been successfully used for a while, my Amazon Alexa or Google Assistant is unable to control Meross devices.

                                                  14How to make my Meross devices work with IFTTT?

                                                  15. Do Meross devices work with my Fritz!Box?

                                                  41. How to make my Meross devices work with SmartThings app?